activate_task · MCP OmniFocus MCP: Risk & Policy

WHAT IT DOES

What activate_task does on MCP OmniFocus

AI agents use activate_task to create or update resources in MCP OmniFocus — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your MCP OmniFocus environment.

WHY IT NEEDS A POLICY

Why activate_task needs a policy

This tool changes task metadata (completion/drop status) in a way that can be undone by calling complete_task or drop_task again. It is not destructive since the change is reversible, not a deletion. It is not Execute since it does not run code or trigger external operations—it simply updates task state.

From the tool's definition The tool 'activate_task' modifies task state by un-dropping or un-completing a task, which is a reversible change to OmniFocus data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

activate_task Rate-limited

activate_task stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "activate_task": {
      "limits": [
        {
          "counter": "activate_task_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches MCP OmniFocus, so you can run agents against it safely.

FAQ

Questions about activate_task

What does the activate_task tool do? +

Activate (un-drop or un-complete) a task in OmniFocus. It is categorised as a Write tool in the MCP OmniFocus MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on activate_task? +

Register the MCP OmniFocus MCP server in PolicyLayer and add a rule for activate_task: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches MCP OmniFocus. Nothing to install.

What risk level is activate_task? +

activate_task is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit activate_task? +

Yes. Add a rate_limit block to the activate_task rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block activate_task completely? +

Set action: deny in the PolicyLayer policy for activate_task. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides activate_task? +

activate_task is provided by the MCP OmniFocus MCP server (someposer/mcp-omnifocus). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.